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The patch adds the code that allows to use equi-join conditions

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for hash join in the cases when there are no suitable indexes
for these conditions.
This commit is contained in:
Igor Babaev
2011-01-04 21:59:41 -08:00
parent 77cbad4b31
commit af800fd92f
16 changed files with 1500 additions and 301 deletions
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mysql-test/suite/innodb/r/innodb_mysql.result
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@ -2656,7 +2656,7 @@ SELECT t1.pk FROM t1,t2
WHERE t1.pk = t2.pk AND t2.pk <> 8;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 11 Using where; Using index
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.pk 1 Using index; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash PRIMARY PRIMARY 4 test.t1.pk 13 Using index; Using join buffer (flat, BNLH join)
SELECT t1.pk FROM t1,t2
WHERE t1.pk = t2.pk AND t2.pk <> 8;
pk